Effect of refining slag compositions on its melting property and desulphurization

To investigate the feasibility of the refining slag with low fluoride, some oxides such as Al , SiO , B , and Li O were used to replace CaF in refining slag with the equivalent weight replacement method, and then the melting temperature and desulphurization capacity of slag were determined. The resu...

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Bibliographic Details
Published inHigh temperature materials and processes Vol. 42; no. 1; pp. pp. 375 - 380
Main Authors Li, Shisen, Kong, Lingzhong, Xu, Zhaolong
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 25.10.2023
Walter de Gruyter GmbH
Subjects
Aluminum oxide
Boron oxides
CaF
caf2
Calcium fluoride
desulfurization effect
Fluxing
Lithium oxides
Melt temperature
Melting
melting temperature
Refining
refining slag
Silicon dioxide
Slag
Substitutes
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Summary:To investigate the feasibility of the refining slag with low fluoride, some oxides such as Al , SiO , B , and Li O were used to replace CaF in refining slag with the equivalent weight replacement method, and then the melting temperature and desulphurization capacity of slag were determined. The results show that the melting temperature of slag (CaF < 4 mass% and Al > 28 mass%) is less than 1,706 K, when CaF is substituted by Al . This slag is able to decrease [S] in steel to less than 0.0060 mass%. In the case of substitution of CaF by SiO , the melting temperature increases, while the desulphurization rate decreases. The fluxing action of B is stronger than that of CaF , and the melting temperature decreases to 1,561 K when CaF is substituted by B . Li O can not only lower the melting temperature of slag but also improve the desulphurization rate.
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ISSN:2191-0324
0334-6455
2191-0324
DOI:10.1515/htmp-2022-0293